NCP81245: Three-Rail Output Controller, IMVP8 Compatible
Description: The NCP81245 is a 3 rail Multi-Phase buck solution...
The NCP81245 is a 3 rail Multi-Phase buck solution is optimized for Intel IMVP8 compatible CPUs with user configurations of 3/2/1 + 3/2/1 + 1 phases, including an option to do 4/3/2/1 + 2/1 + 1. The controller combines true differential voltage sensing, inductor DCR current sensing, input voltage feed-forward, and adaptive voltage positioning to provide accurate regulated power for Notebook applications. The multiphase-rails’ control system is based on Dual-Edge pulse-width modulation (PWM) combined with DCR current sensing providing the fastest initial response to dynamic load events at reduced system cost.
The single-phase controller can be used for SA or GTUS rails. It makes use of ON Semiconductor’s patented high performance RPM operation. RPM control maximizes transient response while allowing for smooth transitions between discontinuous frequency scaling operation and continuous mode full power operation. The single-phase rails have an ultra low offset current monitor amplifier with programmable offset compensation for ultra high accuracy current monitoring.
Multiple Phase Count Configuration - Flexible User Configurable option allows for a one part match all feature
Compatible with Drmos or Discrete Driver - Flexible option to use Drmos or Discrete solution for each phase
Dynamic Reference Injection ®
Supports all-MLCC Output Capacitance
Accurate Total Current Summing Amplifier
Auto Phase Shedding
Switching Frequency 300kHz to 1.2MHz
Technical Documentation & Design Resources
Availability and Samples
Compliance: Pb-free Halide free
Description: Three-Rail Output Controller, IMVP8 Compatible, Three Phase Output Controller with Intel Proprietary Interface
Package Type: QFN-52
Package Case Outline: 485BE
Container Type: REEL
Container Qty: 2500
Market Leadtime (weeks):4 to 8
VCC Min (V):
VCC Max (V):
fSW Typ (kHz):
300 - 1200